Controlling device for electric generators.



No. 805,725. PATENTED NOV. 28, 1905. M. VON HOOR, F. REINITZ 62; L. STARK. CONTROLLING DEVICE FOR ELECTRIC GENERATORS.

APPLICATION FILED APB..17.1601.

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Mllllllllllk ITO 805,725.

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PATENTBD NOV. 28, 1905.

M. VON HOUR, I. REINITZ & L. STARK. CONTROLLING DEVICE FOR ELECTRIC GENERATORS.

APPLICATION FILED APB. 17. 1901.

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UNITED STATES PATENT OFFICE.

MORITZ VON HOOR, FRIEDRICH REINITZ, AND LEOPOLD STARK, OF

- BUDAPEST, AUSTRIAHUNGARY.

CONTROLLING DEVICE FOR ELECTRIC GENERATORS.

troducing an electromotive force in one of Specification of Letters Patent. Application filed April 1'7, 1901. Serial No. 56,243.

Patented Nov. 28, 1905.

T0 all whom it y Con/067': D is the armature, S the field-coils, and Be it known that we, MoRI'rz VON HOOR, R the field-rheostat, of the main generator. FRIEDRICH REINITZ, and LEOPOLD STARK, subd a r are the same parts, respectively, of the jects of the Emperor of Austria-Hungary, and auxiliary generator. residents of Budapest, Austria-Hungary, have K K k are switches. invented certain new and useful [mprove- A indicates accumulators; L L, electric ments in Controlling Devices for Electric lamps or other apparatus consuming elec- Generators, of which the following is a specitricity. Below a certain degree of speed we -fication.' employ accumulators connected in multiple This invention relates to means for con- (and placed, for instance, upon the vehicle or trolling generators actuated by sources of in the cars) for feeding the desired electric power operating at variable speeds, such as current. the shafts of waterwheels and windmills, the As will be seen from the drawings, Fig. 1, axles of railway cars used for supplying the armature of the auxiliary dynamo is conpower for electric lighting, and the like. nected in series with the field-coils S of the The objects of this invention are to furnish main dynamo. If the poles are arranged in a device for producing a uniform voltage of such manner that the armature of the auxilelectric generators actuated by such sources iary dynamo will produce an electromotive of power as above mentioned by making the force inoppositedirection to the electromotive voltage of said generators independent within force prevailing at the points a b, the auxilcertain limits from the speed of the actuating iary dynamo will weaken the field of the main source. dynamo, because the increasing voltage of the It consists, then, in combining with the auxiliary dynamo is increasing in proportion generator an auxiliary generator, which is roto the increasing number of revolutions. By tated by intermediate gearing from the main appropriately selecting and suitably detergenerator or its driving-shaft, and in combinmining the electromagnetic agents and charing said generators in such a manner that the acteristics of both dynamos the resistance of auxiliary generator serves to increase the field the field-coils, the limits of voltage in the density of the main dynamo when the speed auxiliary dynamo, &c., our device will result of the driving-shaft decreases, and vice versa; in equalizing the voltage of the main dynamo Other elements and modifications will be within extreme limits. 8 more fully pointed out and described herein- We will mention or an example that a dyafter. namo with accumulators connected in multiple In the drawings, Figure 1 is a diagramemployed forarailway-train lighting at fourmaticatical representation of a controlling deteen hundred revolutions per minute (correvice embodying this invention. Fig. 2 is a spending toaspeed of the train of fifty miles 9 modified form of the invention. per hour) five thousand watts with thirty-three The voltage of an electric generator actuvolts of terminal voltage has furnished eight ated by a shaft revolving at variable speed hundred watts and thirty-one Volts at a speed changes in proportion with the speed proof twenty-two and one-half miles per hour vided the exciting-current remains approxi- (six hundredand thirtyrevolutions perminute) 9 mately uniform, so that such a generator canwithout necessitating any change or adj ustnot be used if an approximately uniform volment of the brushes or the rheostats. tage is required. Fig. 2 showsa modified form of this inven- This invention avoids the use of complition, the current of the main dynamo being cated and unreliable mechanical regulating influenced by the field of the auxiliary dynamo 1 devices such as have been in use heretofore through a special coil S, producing ampereand substitutes therefor a device for autowindings acting in opposite directions to the matically varying the field density of the coil S-that is to say, the coil S is-opposed c rrent of the main generator-dynamo with generator running at variable speed by in- B the field-coil S and tends to weaken the the field-coils of the generator, said electro; n increase in the number of revolutions or motive force varying in proportio mggg spee of rotation thereof. The excitingspeed. I current of the main as well as of the auxiliary Q I l I d 805,525

ings, are usually not used for regulating the tension of the current, but serve to adjust the regulating limits of the apparatus as a whole by temporarily changing the rheostats in accordance with the kind of the railway-train,

and the character of the railroad and in conformity with the time the train is in motion and the time of the stops, or, for instance, if water-wheels or windmills are used as sources of power, in accordance with the variable speed of the water or of the wind.

Various modifications and changes in detail may be made in this invention without departing from the scope thereof, and we do not limitou rselves to the exact arrangement herein described; but

What we claim, and desire to secure by Let ters Patent, is-

In a controlling device for producing a uniform voltage in electric generators, the combination with a main dynamo running at variable speed, and an auxiliary dynamo running at a speed proportional to that of the main dynamo, a circuit of constant potential supplied by said main dynamo, a single fieldmagnet winding for the auxiliary dynamo, said winding being connected across said circuit, main and opposing field-windings for said main dynamo, said main field-winding being connected across said circuit and said opposing field-winding being connected across the brushes of said auxiliary dynamo.

In witness whereof wehave hereunto set our hands in presence of two witnesses.

MORITZ VON HOOR. FRIEDRICH REINITZ. LEOPOLD STARK.

Witnesses:

PAUL JOSEPH TOMANSCZY, J r., PAUL BOENKEY. 

